The T-matrix may be represented in terms of the scattering dyadic \(S̭({r},{r}^{\prime })\)  via [1]}
\(T_{\alpha \beta } = \int \limits _{4 \pi } \int \limits _{4 \pi } _\alpha ^\ast ({r}) \cdot S̭({r},{r}^{\prime }) \cdot _\beta ({r}^{\prime }) ^{\prime }.\) 
